Remove error handling for removed custom csrf error
Remove error handling for removed custom csrf error

alphagov/digitalmarketplace-admin-frontend,mtekel/digitalmarketplace-admin-frontend,mtekel/digitalmarketplace-admin-frontend,alphagov/digitalmarketplace-admin-frontend,alphagov/digitalmarketplace-admin-frontend,mtekel/digitalmarketplace-admin-frontend,alphagov/digitalmarketplace-admin-frontend,mtekel/digitalmarketplace-admin-frontend